I am kinda jumping into the conversation here, but, I also used to write a certain amount a day for my fanfiction projects when I did write. My personal goal was always 5,000 minimal. To me that was a nice lengthy chapter but to some it could be considered too long. So basically, I wrote a chapter a day and in the end, my best work ended up surpassing 50k.

My worst enemy is writers block. Even though that's most writers problem so no surprise there. Plus, I always seem to have trouble completing a writing project. Even if I roughly plot out everything I am still struggling with filling in all the details in depth.